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<title>动作元素param</title>
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  param用于添加或修改被包含页或被转向页的request对象的参数，常与动作元素forward、include连用
  <br>
  <jsp:include page="included.jsp" flush="true">
    <jsp:param name="jsp" value="text" />
    <jsp:param name="include" value="world" />
    <jsp:param name="param" value="value" />
  </jsp:include>
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